Prosecution Insights
Last updated: October 04, 2026
Application No. 18/605,756

AUTOMATIC CLEANING DEVICE

Non-Final OA §103
Filed
Mar 14, 2024
Priority
Sep 25, 2020 — CN 202011027130.6 +5 more
Examiner
FORDJOUR, SARAH AKYAA
Art Unit
3723
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Beijing Roborock Technology Co., Ltd.
OA Round
3 (Non-Final)
52%
Grant Probability
Moderate
3-4
OA Rounds
7m
Est. Remaining
78%
With Interview

Examiner Intelligence

Grants 52% of resolved cases
52%
Career Allowance Rate
74 granted / 142 resolved
-17.9% vs TC avg
Strong +26% interview lift
Without
With
+25.8%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
38 currently pending
Career history
195
Total Applications
across all art units

Statute-Specific Performance

§101
0.8%
-39.2% vs TC avg
§103
58.0%
+18.0% vs TC avg
§102
23.9%
-16.1% vs TC avg
§112
13.4%
-26.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 142 resolved cases

Office Action

§103
DETAILED ACTION AUTOMATIC CLEANING DEVICE Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Response to Amendment The amendment filed 07-23-2026 has been entered. Claims 1-22 are currently pending and have been examined. Applicant’s amendments overcome 102 and 103 rejection and double patenting rejection for claims 1-21 previously set forth in the Final Office action mailed 05-27-2026. Terminal Disclaimer The terminal disclaimer filed on 07-23-2026 disclaiming the terminal portion of any patent granted on this application which would extend beyond the expiration date of US Patent 11957285 has been reviewed and is accepted. The terminal disclaimer has been recorded. Claim Rejections - 35 USC § 103 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. Claim(s) 22 is rejected under 35 U.S.C. 103 as being unpatentable over Nakanishi (US5815880A) cited in IDS in view of Fan (CN204500545U). Regarding claim 22, Nakanishi teaches a mobile platform (figures 1,5-7; col 3 lines 5-20 and col 4 lines 11-35) configured to automatically move in a target direction on a surface to be cleaned, the mobile platform having a bottom surface;a wet-mode cleaning module (3, figure 9) comprising a cleaning-head (col 3 lines 1-5 and col 3 lines 29-35), a distance between the cleaning-head and the bottom surface of the mobile platform being adjustable; and a lifting mechanism (4, figure 12) configured to drive, via a linear driving mechanism (14, figure 13), the cleaning- head to move to thereby adjust the distance between the cleaning-head and the bottom surface of the mobile platform;wherein when the linear driving mechanism moves in a direction, the distance between the cleaning-head and the bottom surface of the mobile platform is increased (figure 5; col 7 lines 1-20); and when the linear driving mechanism moves in another direction reverse to said direction, the distance between the cleaning-head and the bottom surface of the mobile platform is decreased (figure 5; col 7 lines 1-20); Nakanishi fails to teach an elastic support structure is arranged at the cleaning-head and configured to urge the cleaning-head to abut against the surface to be cleaned. Fan discloses a robotic cleaner that has a reciprocating oscillating motion where the cleaner (abstract) has a cleaner head (2, figures 1-3) with an elastic support structure (8, figure 2) that is arranged at the cleaning-head and configured to urge the cleaning-head to abut against the surface to be cleaned. It would have been obvious to one of ordinary skill in the art before effective filing date of the claimed invention to have modified Nakanishi to include an elastic support structure is configured to urge the cleaning-head to abut against the surface to be cleaned based on the teachings of Fan. This modification would help apply constant or predetermined pressured and help improve the cleaning effect (see Fan). Allowable Subject Matter Claims 1-21 are allowed. Response to Arguments Applicant’s arguments, see pages 1-12, filed 07-23-2026, with respect to the rejection(s) of claim(s) 1-21 under U.S.C. 102 and U.S.C .103 have been fully considered and are persuasive. Therefore, the rejection has been withdrawn. However, upon further consideration, a new ground(s) of rejection is made in view of Fan (CN204500545U) for claim 22. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to SARAH AKYAA FORDJOUR whose telephone number is (571)272-0390. The examiner can normally be reached Monday - Thursday 9:30am - 5:30pm and Friday 6:00am-3:00pm. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Monica Carter can be reached at 571-272-4475. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /SARAH AKYAA FORDJOUR/Examiner, Art Unit 3723 /MONICA S CARTER/Supervisory Patent Examiner, Art Unit 3723
Read full office action

Prosecution Timeline

Mar 14, 2024
Application Filed
Oct 23, 2025
Non-Final Rejection mailed — §103
Jan 15, 2026
Response Filed
May 27, 2026
Final Rejection mailed — §103
Jul 23, 2026
Response after Non-Final Action
Aug 17, 2026
Non-Final Rejection mailed — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12690734
CLEANER HEAD AND CLEANER INCLUDING THE SAME
3y 9m to grant Granted Jul 28, 2026
Patent 12685423
CLEANING MACHINE ERGONOMIC HANDLE
2y 5m to grant Granted Jul 21, 2026
Patent 12667238
SURFACE CLEANING APPARATUS WITH STEAM DELIVERY
3y 3m to grant Granted Jun 30, 2026
Patent 12643158
GRINDING TOOL FOR GRINDING BUTTONS ON A ROCK DRILL BIT
4y 5m to grant Granted Jun 02, 2026
Patent 12520976
SURFACE CLEANING APPARATUS
4y 0m to grant Granted Jan 13, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

3-4
Expected OA Rounds
52%
Grant Probability
78%
With Interview (+25.8%)
3y 1m (~7m remaining)
Median Time to Grant
High
PTA Risk
Based on 142 resolved cases by this examiner. Grant probability derived from career allowance rate.

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